#11398: "avfoundation" audio capture had missing samples randomly
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Reporter: drobinson | Owner: (none)
Type: defect | Status: new
Priority: normal | Component: avdevice
Version: 7.1 | Resolution:
Keywords: avfoundation | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 1 |
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Comment (by drobinson):
I had a chance to do some more investigation.
It seems like the issue is related to
`captureOutput:didOutputSampleBuffer:fromConnection` callback in the
`AVFAudioReceiver` class being called before the `avf_read_packet`
function and freeing/overwriting the `current_audio_frame` before it is
read.
I am able to avoid the dropouts by creating a FIFO for the received
frames.
Not being that familiar with this codebase or AVFoundation, I am not sure
if this is a reasonable fix or not (I suppose there could be
latency/alignment fallout), but the avfoundation_audio_fifo.patch attached
patch seems to resolve the issue for me.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11398#comment:2>
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